[Elecraft] [K2] LiFePO4 replacement for internal SLA battery in K2

[Myron WVØH]

BatterySpace does not add balance circuitry, only over/under I/V protection. What that means is when you charge, the first cell to reach its full voltage, the charge terminates leaving the other cells undercharged. Nothing offered on their website contains any balancing function.

You can get balancing circuitry added but you have to contact them and then they will add what they call "equilibrium" circuitry, to perform the balance function that you and I know.

Myron WVØH
Printed on Recycled Data

> On Sep 12, 2015, at 10:46 AM, Jim Brown <jim at audiosystemsgroup.com> wrote:
> 
>> On Sat,9/12/2015 8:37 AM, inventor61 . wrote:
>> I had strongly considered the LiPo type secondary-cell power packaging option and rejected it.
> 
> There are mfrs of well protected LiFePO4 battery packs. Two I found are Battery Space and Bioenno Power. Both make packs in a wide variety of shapes to fit in the space available in existing products. They include the circuitry inside the pack required to equalize charge and avoid unsafe conditions. These batteries are not cheap, but you'll appreciate the increased energy density.
> 
> If you're concerned about fitting the battery inside the radio, buy a battery and use it outboard. I bought a 20Ah battery from Bioenno Power. It came with two connectors, one a concentric connector for charging, the other a Power Pole. I'm past the backpacking stage, but I bought the battery to support a 6M grid trip to CM79 by a younger ham. He really appreciated the reduced weight.
> 
> Both of these companies sell 12V LiFePO4 batteries range from 3Ah to 125Ah.
> 
> 73, Jim K9YC
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